#!/usr/bin/env python

# Copyright (c) 2009, Purdue University
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"""Make user tool for dnsmanagement"""


__copyright__ = 'Copyright (C) 2009, Purdue University'
__license__ = 'BSD'
__version__ = '0.15'


import os
import sys
import getpass

from optparse import OptionParser

from roster_user_tools import cli_common_lib
from roster_user_tools import roster_client_lib
from roster_user_tools.action_flags import Make
from roster_user_tools.data_flags import User


class Args(Make, User):
  pass


def main(args):
  """Collects command line arguments, adds users/groups/assignments

  Inputs:
    args: list of arguments from the command line
  """
  name = sys.argv[0]
  command = None
  if( args and not args[0].startswith('-') ):
    command = args.pop(0)
  usage = ('\n'
           '\n'
           'To make a user:\n'
           '\t%s user -n <user-name> -a <access-level>\n'
           '\n'
           'To make a group:\n'
           '\t%s group -g <group>\n'
           '\n'
           'To make a user group assignment:\n'
           '\t%s assignment -n <user-name> -g <group>\n'
           '\n'
           'To make a forward zone permission:\n'
           '\t%s forward -z <zone-name> -g <group>\n'
           '\t--access-right <access-right>\n'
           '\n'
           'To make a reverse range permission:\n'
           '\t%s reverse -z <zone-name> -b <cidr-block> -g <group>\n'
           '\t--access-right <access-right>\n' % tuple(
                   [sys.argv[0] for x in range(5)]))
  args_instance = Args(command,
      ['user', 'group', 'assignment', 'forward', 'reverse'], args, usage)
  options = args_instance.options

  try:
    cli_common_lib_instance = cli_common_lib.CliCommonLib(options)
  except cli_common_lib.ArgumentError, e:
    cli_common_lib.DnsError(str(e), 1)

  if( options.zone_name ):
    zones = roster_client_lib.RunFunction(u'ListZones', options.username,
                                          credfile=options.credfile,
                                          credstring=options.credstring,
                                          server_name=options.server)[
                                              'core_return']
    if( options.zone_name not in zones ):
      cli_common_lib.DnsError('Zone does not exist.', 1)

  if( options.group ):
    groups = roster_client_lib.RunFunction(
        u'ListGroups', options.username, credfile=options.credfile,
        credstring=options.credstring, server_name=options.server)[
            'core_return']

  if( options.new_user ):
    users = roster_client_lib.RunFunction(
        u'ListUsers', options.username, credfile=options.credfile,
        credstring=options.credstring, server_name=options.server,
        args=[options.new_user])['core_return']

  if( options.access_right ):
    access_rights = roster_client_lib.RunFunction(
        u'ListAccessRights', options.username, credfile=options.credfile,
        credstring=options.credstring, server_name=options.server)[
            'core_return']
    access_rights_string = '|'.join(access_rights)

  if( command == 'user' ):
    if( options.new_user in users ):
      cli_common_lib.DnsError('Username already exists.', 1)
    roster_client_lib.RunFunction(
        u'MakeUser', options.username, credfile=options.credfile,
        credstring=options.credstring, server_name=options.server,
        args=[options.new_user, options.access_level])
    if( not options.quiet ):
      print 'ADDED USER: username: %s access_level: %s' % (
          options.new_user, options.access_level)

  elif( command == 'group' ):
    if( options.group in groups ):
      cli_common_lib.DnsError('Group already exists.', 1)

    roster_client_lib.RunFunction(
        u'MakeGroup', options.username, credfile=options.credfile,
        credstring=options.credstring, server_name=options.server,
        args=[options.group])
    if( not options.quiet ):
      print 'ADDED GROUP: group: %s' % options.group

  elif( command == 'assignment' ):
    if( options.group not in groups ):
      cli_common_lib.DnsError('Group does not exist.', 1)
    if( options.new_user not in users ):
      cli_common_lib.DnsError('Username does not exist.', 1)

    roster_client_lib.RunFunction(
        u'MakeUserGroupAssignment', options.username, credfile=options.credfile,
        credstring=options.credstring, server_name=options.server,
        args=[options.new_user, options.group])
    if( not options.quiet ):
      print 'ADDED USER_GROUP_ASSIGNMENT: username: %s group: %s' % (
          options.new_user, options.group)

  elif( command == 'reverse' ):
    if( options.group not in groups ):
      cli_common_lib.DnsError('Group does not exist.', 1)
    if( options.access_right is None or
        options.access_right not in access_rights ):
      cli_common_lib.DnsError('An access right of either %s is '
                              'required if specifying a zone.' % (
                                  access_rights_string), 1)

    roster_client_lib.RunFunction(u'MakeReverseRangePermission',
                                  options.username,
                                  credfile=options.credfile,
                                  credstring=options.credstring,
                                  server_name=options.server,
                                  args=[options.cidr_block, options.group,
                                        options.access_right])
    print ('ADDED REVERSE_RANGE_PERMISSION: cidr_block: %s group: %s '
           'access_right: %s' % (options.cidr_block, options.group,
                                 options.access_right))

  elif( command == 'forward' ):
    if( options.group not in groups ):
      cli_common_lib.DnsError('Group does not exist.', 1)
    if( options.access_right is None or
        options.access_right not in access_rights ):
      cli_common_lib.DnsError('An access right of either %s is '
                              'required if specifying a zone.' % (
                                  access_rights_string), 1)

    roster_client_lib.RunFunction(
        u'MakeForwardZonePermission', options.username,
        credfile=options.credfile, credstring=options.credstring,
        server_name=options.server, args=[options.zone_name, options.group,
                                          options.access_right])
    if( not options.quiet ):
      print ('ADDED FORWARD_ZONE_PERMISSION: zone_name: %s group: %s '
             'access_right: %s' % (options.zone_name, options.group,
                                   options.access_right))

  else:
    cli_common_lib.DnsError(
        'Command %s exists, but codepath doesn\'t.' % command, 1)
if __name__ == "__main__":
    main(sys.argv[1:])
